Elements and Atoms

What is the name for the center of the atom where the protons and neutrons are located?

• Atomic weight

• Atomic number

• Nucleus

• Electron cloud

Tags

NGSS.MS-PS1-1

Which of the following is found farthest from the center of an atom?

• nucleus
• proton
• neutron
• electron

Atoms combine to form _______. 

• electrons
• molecules
• nuclei
• neutrons

Tags

NGSS.MS-PS1-1

How do you find the number of neutrons in an atom?

• It is also the atomic number
• It is also the atomic mass
• Add the atomic mass and the atomic number
• Subtract the atomic number from the atomic mass

All atoms of an element have the same number of _____________.

• neutrons
• electrons
• protons
• atomic mass

Tags

NGSS.MS-PS1-1

What kind of charge do neutrons have?

• positive 
• negative
• neutral
• -3

The protons in an atom’s nucleus have what kind of charge?

• positive
• negative
• neutral
• no charge

The element lithium has atomic number of 3. Its atomic mass is 7. How many protons does a lithium atom have? [Type your answer]

Tags

NGSS.MS-PS1-1

The element lithium has atomic number of 3. Its atomic mass is 7. How many neutrons does a lithium atom have? [Type your answer]

Tags

NGSS.MS-PS1-1

The atomic number of magnesium is 12. The atomic mass is 24. How many protons does a magnesium atom have? [Type your answer]

Tags

NGSS.MS-PS1-1